*{
    padding: 0;
    margin: 0;
}
.header-nav{
    background-color: black;
    height: 60px;
}
.header-nav-middle{
    width: 1200px;
    margin: 0 auto;
    height: 100%;
}
div{
    display: block;
}
.header-nav-item{
    margin-left: 25px;
    line-height: 56px;
    font-size: 16px;
    color: #aaa;
    cursor: pointer;
    text-decoration:none;
}
.header-nav-bottom{
    background-color: #f2f2f2;
    height: 60px;
}
/*    中间*/
.content{
    margin-top: -60px;
    padding-left: 0px;
    background-color: #f2f2f2;
    height: 1000px;
}
/*左侧侧边栏样式*/
.list_one{
    width: 357px;
    height: 70px;
    padding-left: 50px;
    border-left: solid 6px #393D49;
    text-align: left;
    line-height: 70px;
    color: darkgray;
    font-size: 20px;
}
.list_one:hover{
    color: white;
    border-left: solid 6px #009688;
    cursor: pointer;
}
.list_two{
    width: 357px;
    height: auto;
    text-align: left;
    line-height: 45px;
    color: darkgray;
    background-color: #282B33;
    display: none;
}
.list_two>div{
    height: 70px;
    padding-left: 50px;
    border-left: solid 6px #393D49;
    text-align: left;
    line-height: 70px;
    color: darkgray;
    font-size: 20px;
}
.list_two>div:hover{
    color:darkgray;
    cursor: pointer;
}
.thisColor{
    background-color: #009688;
}
.another{
    background-color: #393D49;
}
#mr{
    margin-right: 10px;
    opacity: 0.7;
    margin-left: 50px;
    transition: all .3s;
}
.frame-div {
    position: absolute;
    left: 200px;
    top: 60px;
    right: 0;
    bottom: 0;
}
.ifm{
    width: 100%;
    height: 100%;

}
.tuichu{
    padding:10px;
    background: #41A809;
    border-radius: 5px;
}
.tuichu:hover{
    box-shadow: 0 0 1px 1px #cccccc;
}
.side-left{
    background-color: black;
    height: 100%;
}
.frame-div{
    position: relative;
    top: 0px;
    left: 0px;
}
.frame-div iframe{
    width: 1000px;
    height: 100%;
    border: 6px snow solid;
}